The most common and most likely answer to this crossword clue is the 6 letter word SCOPED
I've seen this crossword clue in Financial Times
S
C
O
P
E
D
Buddy explains!

The straight part
We know that "checke" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case checke = scoped.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does SCOPED mean?
SCOPED verb- To perform a cursory investigation of; scope out.
- To perform any medical procedure that ends in the suffix -scopy, such as endoscopy, colonoscopy, bronchoscopy, etc.
- To limit (an object or variable) to a certain region of program source code.
- To examine under a microscope.
- To observe a bird using a spotting scope.